On Tue, Apr 26, 2011 at 06:48:15PM +0200, Marco d'Itri wrote: > On Apr 26, rleigh <rle...@codelibre.net> wrote: > > > Testing with initramfs-tools (maks/run) with current unstable shows > > udev appearing to work correctly with it using /dev/.udev when /run > > is not present on the host system. And also with /run present on > Did you check with LVM and that all its persistent symlinks are still > there?
I created a new kvm VM this morning which uses LVM, so I'll test all the combinations later tonight. > > In a kvm VM, I do see some errors from udev at startup: > These are unrelated and harmless (the errors are old, only the message > is new). > > > > Why does /run should not be noexec? > > If /run/shm is also on /run (not a separate mount), it needs to be > > executable. > Why do we need it executable? From what I've read from past initscripts and other bug reports, it's required for mmapping shared memory with PROT_EXEC, but I have not verified this by writing a testcase. > > > > Marco, have you tested this upgrade path? That is /run in the > > > > initramfs and no /run on the rootfs? Is udev checking for that and > > > No, but if the database is not copied to the initramfs then LVM will be > > > annoyed. > > Which database is this? Is this something that the LVM scripts need > > updating to handle? > It is /dev/.udev/ or /run/udev/. I do not know exactly how LVM interacts > with it, just that it must be preserved. OK. I feel that doing something like this: if [ -d /run ] && [ ! -d /root/run ]; then mv /run/udev /dev/.udev (or mv /run/udev /root/dev/.udev) fi at the point where we "mount --move" in the initramfs would be the best action to take. It preserves the udev state from the initramfs when it would otherwise be lost. In the case where /run also exists on the rootfs, no action needs taking. When I do the testing in my new VM, I'll test this type of change as well. Regards, Roger -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `- GPG Public Key: 0x25BFB848 Please GPG sign your mail.
signature.asc
Description: Digital signature
